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Finding the Fourth Proportional to 1,328,354,920.80, 1,993,382,686.80 and 775,656,280.80

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Solution

The fourth proportional to 1,328,354,920.80, 1,993,382,686.80 and 775,656,280.80 is: 1,163,980,933.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328,354,920.80 : 1,993,382,686.80 = 775,656,280.80 : x
  2. Step 2: Convert to fraction form
    1,328,354,920.80/1,993,382,686.80 = 775,656,280.80/x
  3. Step 3: Cross multiply
    1,328,354,920.80x = 1,993,382,686.80 × 775,656,280.80
  4. Step 4: Simplify right side
    1,328,354,920.80x = 1,546,179,801,054,399,232
  5. Step 5: Solve for x
    x = 1,546,179,801,054,399,232/1,328,354,920.80
  6. Step 6: Final answer
    x = 1,163,980,933.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.